Current Electricity 5 Question 12

12. A rigid container with thermally insulated walls contains a coil of resistance 100Ω, carrying current 1A. Change in internal energy after 5min will be

(a) zero

(b) 10kJ

(c) 20kJ

(d) 30kJ

(2005,2M)

Objective Question II (One or more correct option)

Show Answer

Solution:

  1. W=0. Therefore, from first law of thermodynamics,

ΔU=ΔQ=i2Rt=(1)2(100)(5×60)J=30kJ.

Correct answer is (d).



जेईई के लिए मॉक टेस्ट

एनसीईआरटी अध्याय वीडियो समाधान

दोहरा फलक